I have several outdoor weather stations that send continuous (every 3 seconds) wireless updates to an indoor receiver that is several walls and rooms away from where the signal enters straightline into the house. These batteries perform from -25 degree F to 90 degrees F and typically last for over a full year before needing to be changed. Great when the weather station is on a pole 8+ feet above the ground (no fun to change batteries in mid-winter). I actually change out after 15-months before cold weather sets in so I won't have to think about it in a cold Minnesota winter.
These batteries also work great in handheld GPS receivers used for hiking (don't want it to quit out on the trail with kids) and geocaching, as well as for many motorized devices that use AAs.
Very impressed with the long life of these batteries.
What's great about it: Extremely long lasting - especially in outdoor cold weather devices & motorized toys and devices
What's not so great: Very expensive per battery, lithium batteries shouldn't be disposed of in a landfill - should be recycled